NOAO >   Observing Info >   Approved Programs >   2002A-0043

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Proposal Information for 2002A-0043


PI: John Feldmeier, Case Western Reserve University, johnf@eor.astr.cwru.edu
Address: 10900 Euclid Ave, Cleveland, OH 44106, USA

CoI: Chris Mihos, Case Western Reserve University
CoI: Heather Morrison, Case Western Reserve University
CoI: Paul Harding, University of Arizona

Title: The Properties of Intracluster Light and the Halos of cD Galaxies

Abstract: We propose deep imaging to continue our study of the intracluster light (ICL) and extended halos of cD galaxies in galaxy clusters as a function of cluster environment. The ICL is likely formed both from violent relaxation during cluster formation and from subsequent tidal stripping of cluster galaxies, so that its properties should be linked to the dynamical evolution of the cluster and to the distribution of dark matter in cluster galaxies. The structure of the ICL, therefore, should vary between clusters with different physical properties. Furthermore, the structure of cD halos - the deviation from or adherence to a pure R^1/4 law - may indicate whether these structures are formed predominantly during early cluster collapse or later infall and tidal stripping. To extend our studies, we will target six rich Abell clusters which span a range of Bautz-Morgan type, from cD- dominated type I clusters to type III clusters where the galaxy population is more uniform. In addition, we also plan to observe several MKW/AWM poor clusters to see how the properties of ICL vary as a function of cluster richness. This sample will allows us to probe how the properties of the ICL and cD halos vary over a range of cluster environments. We are requesting 7 dark nights on the 2.1m to reach (mu)_V=26.5 mag/sq arcsec in each cluster. This proposal received an average score of 8.40 last period but it was rejected due to scheduling constraints. We are therefore re- proposing for it this period.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



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